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中文摘要: 利用NOAA卫星观测的多年平均OLR及2003年的OLR资料，分析了2003年夏季OLR场的异常特征及其与2003年中国夏季异常天气的关系。结果表明，2003年夏季在60～150°E范围内热带辐合带(ITCZ)主要分布在赤道以北的阿拉伯海、孟加拉湾到南海地区，其中孟加拉湾、阿拉伯海地区的对流较常年偏强，而南海地区的对流较常年的偏弱；菲律宾以东洋面的OLR场数值异常偏高，对流活动异常不活跃，这是2003年台风异常偏少的主要原因；OLR大于250W·m-2的区域所表征的西太平洋副热带高压与常年相比，表现为南北活动相对稳定、东西出现振荡、强度偏强的特征，这是2003年南方持续高温酷暑天气的主要原因之一。
中文关键词: OLR，ITCZ，对流，台风
Abstract:With the Outing Longwave Radiation (OLR) data sets observed by the NOAA satellites, the diagnostic analyses of the OLR characteristics over the tropical and subtropical regions and its (impacts) on the unusual weather processes in China in the summer of 2003 are done. The results show that the ITCZ distributing over the Bay of Bengal and the Arabian Sea are stronger than (usual), while that over the South China Sea is weaker than (usual) in the summer of 2003, the anomalous OLR in the east of the Philipine Islands is anomalously higher than (usual), the anomalously inactive convective region is the main factor leading to fewer typhoons than (usual). Moreover, the subtropical Anticyclone in the West Pacific Ocean described by the area in which OLR is more than 250W·m(-2) is characterized by the relative stability in the north-south direction and the oscillation in the east-west direction, which is one of the primary reasons causing the higher temperature over South China in the summer of 2003.
keywords: OLR,ITCZ,convective activity,typhoon
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基金项目:国家自然科学基金项目40205008和40135020资助
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引用文本：
于玉斌,姚秀萍,2005.2003年夏季OLR特征及与中国异常天气的关系[J].气象,31(7):10-15.
,2005.OLR Characteristics and Relationship with Abnormal Weather Processes in China in Summer 2003[J].Meteor Mon,31(7):10-15.
于玉斌,姚秀萍,2005.2003年夏季OLR特征及与中国异常天气的关系[J].气象,31(7):10-15.
,2005.OLR Characteristics and Relationship with Abnormal Weather Processes in China in Summer 2003[J].Meteor Mon,31(7):10-15.